Fusion temperature of pure silica (SiO2) is _______________ °C?
Fusion temperature of pure silica (SiO2) is _______________ °C?
A. 1350
B. 1715
C. 2570
D. 2800
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Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?
Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?A. 55
B. 70
C. 80
D. 90What is the value of ‘q’ for saturated liquid feed to a distillation column ?
What is the value of ‘q’ for saturated liquid feed to a distillation column ?A. 0
B. <1
C. 1
D. >1Zircon refractories have__________________?
Zircon refractories have__________________?A. Low co-efficient of expansion
B. High RUL (1600°C) and refractoriness (> 2000°C)
C. High spalling resistance
D. All A., B. and C.Fireclay bricks are not used in the_____________________?
Fireclay bricks are not used in the_____________________?A. Blast furnace
B. Hot blast stove
C. Cupola
D. Wall of coke ovenCarbon refractories have very high __________________?
Carbon refractories have very high __________________?A. Wetting characteristics
B. Refractoriness
C. Thermal conductivity
D. Both B. and C.Carbon refractories are exclusively used in the_________________?
Carbon refractories are exclusively used in the_________________?A. Hearth of blast furnace
B. Walls of coke oven
C. Regenerators of coke oven
D. Side wall of soaking pits